Add a License

[Xterminate1818]

Awesome color pallet! I wanted to use it on my website for my code blocks, but noticed there is no license. It would be great if you could clarify how and where your work can be used. I noticed that the highlight.js uses your pallet and credits you, but technically they don't have the right because you haven't added a license. If this is intentional and you don't want your pallet used in other projects, you should probably go bother them because their project seems quite popular. Thanks!